Wiring

NOTE:

If you need to connect the trunk cords differently from the instructions on the system forms, record each change on Form 2c, System Numbering: Line/Trunk Jacks. See Appendix A, “System Numbering Forms.

Also, you may need to know the interface codes for network facilities, These codes are shown in Table 4–2, by trunk type and adapter type.

Table 4-2. CentraI Office Network Interface Codes

 

Federal Interface

Network Interface

Trunk Type

Code for Trunk

 

 

 

LS central office trunk

02LS2

RJ11C, RJ14C. RJ21

GS central office trunk

02GS2

RJ11C, RJ14C, RJ21

DID

02 RV2-T

RJ11C, RJ14C, RJ21

 

 

 

OPS

0L13C

RJ11C

Tie trunk

TL31M

RJ2GX

 

 

 

DS1

04DU9-B

RJ48C/X

 

04DU9-C

See note below.

NOTE:

The preferred network interface is the RJ48X. If a customer’s site uses the RJ48X interface and the customer’s equipment does not provide connection, the T1 trunk’s receive pair is looped back to the transmit pair. This simplifies troubleshooting the T1 trunk from the central office.

In most installations, the network interface is connected through a cross- connect field to the control unit. However, for systems with fewer than 24 extensions, you can connect the trunk wires directly to the control unit.

When constructing wiring fields between the network interface and the control unit, you must order hardware as individual parts, Do not use Interconnect Wiring or Systimax wiring kits.

Connecting the Control Unit to the Network Interface 4-3

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Image 144
AT&T 3.0 manual Did